Charles h



C. H. GUNN.

SECTIONAL CASING FOR PNEUMATIC TIRES.

APPLICATION FILED MAY 28, I918.

' '1 3 2, 97g. Patented Aug. 12, 1919.

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(Adlai Hamil" BY ,Mm/

A TTORNEY.

' UNITED STATESIPATENT OFFICE.

cmtns H. GUNN, .OFEMERYVILLE, CALIFORNIA.

: SEGTIONAL cAsInG non PNEUMATIC minus. I

To all whom it may concerm residing at Emeryville, in the; county of Alameda and State of California, have invented certain new and useful Improvements in Sectional Casings for Pneumatic Tires; and I do declare the following to be a clear, full, and exact description of the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application.

This invention relates to improvements in pneumatic tires and particularly to the outer casing thereof. The object of the invention is to produce an outer casing for the inner tube which, instead of being solid as is now common practice, will be made in numerous sections all bound together at their inner edges by a flexible beading or cable. Such a sectional casing will provide a greater flexibility and resiliency whereby at the same time the tread portion thereof can be made so strong as to wear away very slowly, and the side walls can be so built as to prevent them from collapsing or breaking out as is now often the case with casings commonly in use.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purposes for which it is designed.

These objects, I accomplish by means of such structure and relative arrangement of the parts as will fully appear by a perusal of the following specification and claim.

On the drawings, similar characters of reference indicate corresponding parts in the several views.

Figure 1 is a side elevation of the complete casing as it appears when mounted on the rim.

Fig. 2 is a side elevation, partly broken out and in section, of one of the casing sections.

Fig. 3 is an end view of the same also broken out and partly in section.

In maln'ng up my improved sectional casing, I provide a plurality of sections arranged in successive order so as to form the proper annulus to receive the inner tube and to permit the casing to be mounted on the rim of the wheel. Each section comprises a relatively heavy tread portion 1 Specification of Letters Patent. P tented Aug. 12, 1919- Application filed May as, 1918. Serial No. 237,093,.

consisting of 'laminations of fabric set ver- RLES I I. GUNN,

tically' edgewise' to present the edges thereof to the wear of the road surface. These laminations are all vulcanized together with a hard rubber composition. The ends of the portions 1 taper, as at 2, to form the side walls of the casing. A stri of fabric 3 is mounted on the inner sur ace of each of the sections and is formed into base loops, as at 4, and then extends upwardly over the sides 2. This fabric is held in place by stitching 5 which is drawn through the fabric 3 both on the inside and outside of the member 1' and also through such member 1. Staples 5 are also driven through the fabric 3 on the outside of the member 1 and well into such member 1 so as to prevent any tendency of the stitching to pull loose. Cross rivets 6 extend transversely through the members 1 to prevent any breaking down of the fabric on the ends. of the said members 1. All of the sections are held together as a composite unit by means of fiber cables or beads 7 which extend through the loops 4. The sections 1 are held from creeping movement relative to the cables by means of double tacks 8 which extend through the fabric 3 and the cables 7. The free-ends of these tacks 8 are clenched down to hold the same in place and present a smooth surface. In practice, a stretchless interliner 9 is arranged within the sectional casing and inside of this is disposed the inner tube 10. This interliner prevents the inner tube from squeezing in between the sections 1. At the same time, the construction of the sectional casing renders the same extremely flexible and wear resisting. It can also be easily and cheaply manufactured.

From the foregoing description it will readily be seen that I have produced such a device as substantially fulfils the objects of the invention s set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice, such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claim.

Having thus described my invention, what I claim as new and useful and desire to secure by'Letters Patent is A sectional casing for pneumatic tires comprising a plurality of sections arranged side by side to form an annulus, each section embodying a tread portion tapered at its ends, a lamination of fabric passing around the inner surface of the tread por-- tion and for a certain distance on each side around the outer surface thereof and forming loops adjacent the tapered end of said tread portion, the terminations of the fabric on the outside being secured to the fabric on the inside through the tread portion by stitching therethrough and being further held by metallic staples driven into the tread portion, endless cables passing through the loops of all the sections, and

metallic securing members passing through 5 each loop and the respective cable, whereby the sections will be held from creeping on the cables.

In testimony whereof I aifix my signa= ture in presence of two Witnesses, v

' CHARLES H. GUNN. Witnesses:

C- L. .B RH M, M- MARB Oopies of "this patentmay be obtained for five cents each, "by addressing ,the Commissioner of Patents. Washington, D. 0;" 

